Found in Canada from Nova Scotia west to Saskatchewan. In the US, it occurs from New England west to North Dakota, Nebraska and Eastern Colorado. It is less common in the south, but can be found from Florida to eastern Texas.

Seasonalityand Size:

One brood in the north from May-Oct, two broods in the south. Wingspan 88 - 115 mm.

Larva andHost Plants:

Larva is brown or green, with spinulose horns on the thorax, in addition to the horn at the end of the abdomen, leading to its alternate common name of Four-horned Sphinx. Much of the body is covered with white granules and a ridge of scalelike plates runs down the dorsal midline. The food plants are elm, basswood, and birch.